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CBSE Class 12-science Answered

the number of meiotic and mitotic divisions required to form 40 male gametes and 60 female gametes in a plant with 48 chromosomes in its meiocyte.... 1). 48 & 420 2) 65 & 460 3) 60 & 40 4)460 & 65.... Given answer is optiona (2) ...but i want explanation....  If u can then plzzz help
Asked by jhajuhi19 | 21 Dec, 2018, 01:23: PM
answered-by-expert Expert Answer
Total number of meiosis needed to produce 100 seeds = x + x/4 = 40 + 100/4 = 40+25= 65  
So, 65 meiotic divisions are required
 
Total number of mitotic division 
 
For male gametes, total number of divisions = 4n= 40x4= 160
For female gametes, total number of divisions= (2n+1)= 5x60= 300
 
So, total number of mitotic divisions= 300+160=460
Answered by Sivanand Patnaik | 24 Dec, 2018, 11:36: AM

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the number of meiotic and mitotic divisions required to form 40 male gametes and 60 female gametes in a plant with 48 chromosomes in its meiocyte.... 1). 48 & 420 2) 65 & 460 3) 60 & 40 4)460 & 65.... Given answer is optiona (2) ...but i want explanation....  If u can then plzzz help
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ANSWERED BY EXPERT ANSWERED BY EXPERT
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